I would say to have a good chemist mix your fisrt dose, being you have a good frame, and a few years of solid lifting behind ya.
Jumping in and doing it half-arshed is a waste of $$$, gear, time. And the results never last. Remember that the gear is ONLY part of the equation to winning BB shows, or just looking good (by that I mean body and strength,etc).
I would keep from slin/gh, bascally KISS it.